What mass (in g) of potassium chlorate is required to supply the proper amount of oxygen needed to burn 136.7 g of methane

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

What type of reaction fuels the processes seen here?

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.